Thermal Properties of Polonium and Protactinium
Specific Heat
0.12 J/(kg K)
  
40
0.12 J/(kg K)
  
40
Molar Heat Capacity
26.40 J/mol·K
  
28
Not Available
  
Thermal Conductivity
20.00 W/m·K
  
99+
47.00 W/m·K
  
32
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
23.50 µm/(m·K)
  
16
9.90 µm/(m·K)
  
40
Enthalpy
  
  
Enthalpy of Vaporization
60.30 kJ/mol
  
99+
Not Available
  
Enthalpy of Fusion
13.00 kJ/mol
  
26
12.34 kJ/mol
  
28
Enthalpy of Atomization
134.00 kJ/mol
  
99+
Not Available
  
Standard Molar Entropy
Not Available
  
198.10 J/mol.K
  
1